33 #ifndef _GLIBCXX_CXX_IO_H
34 #define _GLIBCXX_CXX_IO_H 1
38 #include <bits/gthr.h>
40 _GLIBCXX_BEGIN_NAMESPACE(
std)
42 typedef __gthread_mutex_t __c_lock;
45 typedef FILE __c_file;
47 _GLIBCXX_END_NAMESPACE
ISO C++ entities toplevel namespace is std.